Microfilm attachment for copying machine

ABSTRACT

A microfilm attachment for an electrostatic copying machine. The copying machine includes a scanning window and a roller exposed at the upper surface thereof. The microfilm attachment is placed on top of the machine and includes a roller which engages the machine roller. The attachment roller is coupled to a plate which carries a microfilm original to be copied. As the machine cycles, the machine and attachment rollers turn, and the microfilm original is moved. A projection lamp initially images the microfilm on a screen. At the start of the copying cycle, a mirror in the attachment is moved to direct light transmitted through the moving microfilm original to the scanning window for the purpose of exposing copy paper which is moved past an exposure window in the machine at the same time. Because when the microfilm original is initially imaged on the screen it is centrally disposed relative to the machine scanning window, at the start of the copying cycle the microfilm original is actually moved in the reverse direction until it clears the scanning window. Thereafter, it is moved in the forward direction past the scanning window. At the end of the scanning sequence, the microfilm original is returned in the reverse direction to the initial position. The copy paper feed begins while the microfilm original first moves in the reverse direction so that the copy paper reaches the exposure window just when forward movement of the microfilm original is to begin. The microfilm attachment includes several switches which are operated depending upon the position of the microfilm original during the sequence. These switches are extended through connectors on the attachment and the copying machine to the control circuit within the machine so that the machine is properly sequenced with respect to movement of the microfilm original.

United States Patent Van Auken et al.

[451 July is, 1972 [s41 MICROFILM ATTACHMENT FOR COPYING MACHINE [72] inventors: John Van Aulten, Miami Beach; M. Gene South Miami, both of Fla; Wllliam A. Hall, Centerport, NY.

[73] Assignee: Sum Industries, Inc, New York, NY. [22] Filed: Apr! 22, 197i) 2]] Appl. No.: 30,922

Primary Examiner-Samuel S. Matthews Assistant Examiner-Russell E. Adams, Jr. Atrorney-Amster & Rothstein l 5 ABSTRACT A microfilm attachment for an electrostatic copying machine.

The copying machine includes a scanning window and a roller exposed at the upper surface thereof. The microfilm attachment is placed on top of the machine and includes a roller which engages the machine roller. The attachment roller is coupled to a plate which carries a microfilm original to be copied. As the machine cycles the machine and attachment roller: turn, and the microfilm original is moved. A projection lamp initially images the microfilm on a screen. At thestart ot' the copying cycle a mirror in the attachment is moved to direct light transmitted through the moving microfilm original to the scanning window for the purpose of exposing copy paper which is moved past an exposure window in the machine at the same time. Because when the microfilm original is initially imaged on the screen it is centrally disposed relative to the machine scanning window, at the start of the copying cycle the microfilm original is actually moved in the reverse direction until it clears the scanning window. Thereatter, it m moved in the forward direction past the scanning window. At the end of the scanning sequence, the microfilm original is returned in the reverse direction to the initial position. The copy paper feed begins while the microfilm original first moves in the reverse direction so that the copy paper reaches the exposure window just when forward movement of the microfilm original is to begin. The microfilm attachment includes several switches which are operated depending upon the position of the microfilm original during the sequence. These switches are extended through connectors on the attachment and the co ying machine to the control circuit within the machine so that the machine is properly sequenced with respect to movement of the microfilm original.

36 Claims, 34 Drawing Figure Patented July 18, 1972 1'7 Sheets-Sheet l Patented July 18, 1972 17 Sheets-Sheet 2 1'7 Sheets-Sheet L Patented July 18, 1972 Patented July 18, 1972 3,677,637

17 Sheets-Sheet 7 Patented July 18, 1972 3,677,637

1'? Sheets-Sheet 8 1 U5 33 3 S .....m

VII

Patented July 18, 1972 17 Sheets-Sheet 9 Patented July 18, 1972 1'? Sheets-Sheet l0 Patented July 18, 1972 1'7 Sheets-Sheet ll FIG. 2[.

Patented July 18, 1972 1 7 Sheets-Sheet 12 1 7 Sheets-Sheet 15 Patented July 18, 1972 Patented July 18, 1972 3,677,637

17 Sheets-Sheet l5 Patented July 18, 1972 3,677,637

1 7 Sheets-$h 1 Patented July 18, 1972 3,677,637

17 Sheets-Sheet 17 MICROFILM ATTACHMENT FOR COPYING MACHINE This invention relates to a copying machine system in which a plurality of attachments can be placed on a single copying machine to enable the copying machine to operate in different modes, and more particularly to a microfilm attachment for use in such a system.

There are many different types of copying machines on the market at the present time. Each of these machines generally is capable of operating in only a single mode. For example, there are machines which are capable of making copies only of sheet documents (letters, etc.). Such machines cannot make copies of a page of a book, for example, because typically the document to be copied must be moved through the machine and the original transport system cannot accept a book or other bulky article for transport. Other machines are capable of copying a page of a book. A book can be placed on top of a stationary scanning window with the page to be copied being scanned by a moving optical system, or the book can be placed on top of a glass platen which is moved past a stationary optical system. Book copiers are also capable of copying sheet documents (a sheet document can be thought of as a very thin book). A third type of machine is one which makes paper copies of microfilm originals. A survey of the machines presently on the market reveals that each machine is generally capable of operating in only a single mode-for example, as a letter copier, as a book copier, or as a microfilm copier.

Most businesses, if they require a copying machine at all, generally have a need to make copies of sheet documents. Letter copiers are usually smaller and faster than copying machines of other types. An example of a small, fast letter copier is disclosed in Van Auken et al. application Ser. No. 725,390, filed on Apr. 30, 1968. in the Van Auken et al. machine, letters can be fed in succession, one immediately after the other, into the nip of input rollers, the successive original documents being collected in an original tray and the copies being collected in a copy tray. While a letter copier is the most commonly required type of copying machine, on occasions there is a need to make a copy of a page of a book. Thus, those businesses requiring book-copying capabilities generally purchase a book copier (which can make copies of letters as well). In order to acquire the relatively infrequently used book copying capability, a number of inconveniences must be put up with. First, the book copier generally requires more space. It is also much slower even when copying letters because it takes longer to remove a first letter from the platen after it is copied before another is put in place than it does to simply feed letters in succession into the nip of input rollers.

Finally, where it is necessary to copy microfilm originals, it has been the practice to purchase an additional machine for this purpose-at significantly increased total cost and at the expense of space.

In the copcnding application of Van Auken et al., Serial No. 30,923, filed on Apr. 22, 1970, there is disclosed a copying machine system which includes a copying machine and various attachments therefor, the copying machine being designed to cooperate differently with each attachment in order to operate in a different mode.

It is a general object of our invention to provide a microfilm attachment for a copying machine.

It is another object of our invention to provide an improved electrostatic microfilm copier.

The copying machine utilized in the system is similar to that disclosed in the Van Auken et al. application, Ser. No. 725,390. At the top of the machine there is provided a plurality of rollers which can be rotated in either direction by an original drive chain in the machine. The machine includes an electrical circuit for controlling energization of the exposure lamps, the operation of a knife to cut copy sheets from a roll of copy paper, switching of the direction movement of the rollers at the top of the machine, etc. The electrical circuit is not complete; various points in the circuit terminate at pins in an electrical connector placed on top of the machine.

The letter copying attachment used with the machine consists of a bridge which is placed on top of it. The bridge includes another set of mating rollers which are driven by the rollers in the copying machine. Together, the pairs of rollers transport an original document between the top of the machine and the bottom of the bridge. The document is shuttled back and forth when it is necessary to make multiple copies of the same original. The bridge includes a connector which mates with the machine connector. The bridge connector serves to complete the electrical circuit of the copying machine in order that die machine operate in the letter copying mode. The bridge also includes a plurality of photocells which are energized by exciter lamps at the top of the copying machine. The photocells determine the position of the original document underneath the bridge. The photocells are included in the bridge electrical circuit coupled to the machine circuit, and the photocell outputs control the machine to cut a roll of copy paper at the appropriate times, to reverse the direction of rotation of the machine rollers, etc. With the letter bridge on top of the machine, there results an overall configuration which offers all of the advantages of a letter copier, including fast operation and compact size.

The second attachment used with the machine, the book copier" attachment, includes a glass platen which is placed on top of the machine. The glass platen is moved back and forth by the machine rollers, a book on top of the platen thus being moved back and forth past the scanning window on top of the machine. The book copier attachment includes a cam which can be set to correspond to the length of the original page to be copied. A series of microswitches are provided on top of the copying machine, and as the glass platen is moved back and forth by the machine rollers, the cam operates the microswitches to synchronize the machine operation to the position of the platen. The book copier attachment includes an electrical connector which mates with the machine connector to thereby change the electrical circuit of the machines so that it operates in the book copying mode. For example, un like the letter copying mode, there is no need to utilize the photocell amplifiers in the machine when operating in the book copying mode. There are also some additional significant differences in the machine operation in the book copying mode which will become apparent below.

There is also a mechanical change made in the basic machine when the book copier attachment is placed on it. The glass platen has a certain thickness which would otherwise increase the optical path of light reflected from the original to be copied and transmitted to the exposure station where it strikes the copy sheet. lfthe optical path of the basic machine is designed to properly focus light reflected from from an original document (on top of the machine) on the copy sheet, the increased optical path length as a result of the thickness of the glass platen would result in imperfect focusing of the light reflected from a book (or original document) placed on the glass platen. For this reason, when the book copier attachment is placed on the machine, it causes a lever to move, which lever in turn repositions a mirror inside the copying machine. The repositioned mirror serves to shorten the optical path inside the machine. The total length of the optical path resulting from the increase caused by the glass platen and the decrease caused by the repositioned mirror provides perfect focusing.

The book copier attachment includes a pair of rails which extend outward from the machine; the rails are required to support and guide the glass platen as it is moved back and forth by the machine rollers. The rails necessarily increase the size of the overall machine. However, the rails and the glass platen can be attached to or removed from the copying machine in less than a minute. (Similar remarks apply to the letter copier bridge.) This means that in ordinary operation, the letter copier bridge can be left on the machine, thereby resulting in the most compact arrangement possible as well as maximum speed in the successive feeding in of original documents to be copied. Only when it is required to make a copy of a bulky article, such as a book, does the letter copier bridge have to be removed and the book copier attachment placed in its stead on top of the machine. After the necessary copies are made, the letter copier bridge can be placed back on the machine. This arrangement allows the advantages of both types of prior art machines to be obtained, without requiring two different machines for the purpose.

In accordance with the principles of our invention, the third attachment, the microfilm scanner" or microfilm reader" can be moved between two positions in accordance with the operation of a solenoid. In a first position, the mirror directs the microfilm image to the screen. In this manner, a microfiche card, for example, can be positioned until the desired frame is selected. In the second position, the mirror allows the light to be projected through the microfilm to the scanning window of the copying machine. This light is used to expose the copy paper.

It is necessary to move the microfilm image as the copy sheet is moved through the machine so that they are in optical synchronization with each other. (Movement of the microfilm in this manner corresponds to movement of a letter through the letter copying bridge or movement of the book copier glass platen.) The microfilm scanner includes a roller which engages one of the machine rollers and is driven thereby. The machine roller controls movement of the microfilm to be copied. But a completely different sequence of roller movements is required for the microfilm reader. (For example, the microfilm must first be transported in the reverse direction after selection of the frame to be copied inasmuch as when a frame is selected, it is centered with respect to the scanning window rather than being in front of it.) This will become apparent below. The microfilm reader includes a cam which is driven by the machine roller, as well as a group of microswitches operated by the cam. As the cam rotates, the microswitch operations indicate the position of the microfilm frame to be copied. The microswitches are extended to an electrical connector on the microfilm reader which engages the electrical connector on the machine. The resulting overall electrical circuit is different from the letter copier and book copier circuits and enables the overall machine to function in a third mode. The microfilm reader further includes additional mechanisms, such as a solenoid for moving the mirror to control either imaging of the microfilm frame on the screen or the transmission of the light projected through it to the machine scanning window. The solenoid is similarly coupled to the electrical circuit of the copying machine through the electrical connectors, and is thus operated at the appropriate times to control scanning.

On those occasions when it is necessary to make a paper copy of a microfilm original, all that is required is to remove the letter copier bridge from the machine and to replace it by the microfilm reader. The microfilm reader (as also the letter and book copiers) can be operated in a multiple copy mode so that multiple copies of a selected microfilm frame can be made. After the microfilm reader is thus used, it can be replaced by the letter copier bridge which prepares the machine for its usual mode of operation. Instead of requiring a separate machine for the purpose of making copies of a microfilm original, all that is required is a relatively simple microfilm reader attachment for the basic machine.

It is a feature of our invention to provide a microfilm attachment for a copying machine having an electrical circuit terminating at a number of points in an electrical connector, the machine operating in different modes depending on particular attachments placed thereon, the microfilm attachment including a mating electrical connector for completing the overall electrical circuit of the machine so that it sequences to make copies of a microfilm original.

It is another feature of our invention to provide a drive mechanism in the microfilm attachment for engaging a drive mechanism at an exposed surface of the machine to thereby control the movement of various elements in the microfilm attachment in synchronization with the operation of the copying machine.

Further objects, features and advantages of our invention will become apparent upon consideration of the following detailed description in conjunction with the drawing, in which:

FIG. 1 is the same as FIG. 1 in the Van Auken et al. application Ser. No. 725,390 and depicts the general layout of the various elements included in the copying machine with which the microfilm attachment of our present invention is used;

FIG. 2 is a side view of the copying machine (with the side cover removed) and depicts the chains for driving various elements in the machine, and the positions of four switches and a start button on top of the machine;

FIG. 3 depicts schematically the control circuit of the copying machine of FIG. 2 (which machine includes the various internal elements shown in FIG. 1), various points in the circuit being connected to respective pins in connector 132 on top of the machine;

FIG. 4 depicts various cams and switches contained within two cover plates (shown in FIG. 2):

FIG. 5 depicts the two switches and cams which control multiple copying of an original and are included in the copying machine;

FIG. 6 depicts another switch and cam included in the copying machine;

FIG. 7 depicts the shape of cam 96 of FIG. 4, together with three dimensions thereof;

FIG. 8 is a plan fiew showing the top of the machine of FIG. 2 with no attachment placed on it;

FIG. 9 is a top plan view of the first attachment, the letter bridge, when placed on top of the copying machine;

FIG. 10 is a sectional view of the letter bridge taken through the line 10-10 of FIG. 9;

FIG. 11 is a bottom plan view of the letter bridge of FIG. 9;

FIG. 12, a sectional view taken through line 12-12 of FIG. 9, depicts the locking mechanism for securing the letter bridge to the top of the copying machine;

FIG. 13 illustrates the pin connections in connector 201 of the letter bridge;

FIG. 14 depicts the circuit of FIG. 3 which results when connector 201 of the letter bridge is mated with connector 132 of the copying machine (which connector has various pins coupled to numerous points in the circuit of FIG. 3);

FIG. 15 is a top plan view of the copying machine with the second attachment, the book copier, secured in place;

FIG. 16 is a side view of the copying machine, shown partially broken away, and illustrates the manner in which rails 151 and 152 are attached to the machine, and the manner in which lever 162 is moved when rail 151 is put in place;

FIG. 17 depicts the manner in which mirror I76 is moved within the machine when rail 15] is put in place;

FIG. 18 is a sectional view taken through the line 18-18 of FIG. I5;

FIG. 19 is similar to FIG. 18 but shows movable cam 154 moved to the left relative to the position shown in FIG. 18;

FIG. 20 is a sectional view taken through the line 20-20 of FIG. 15;

FIG. 21 illustrates the connections made in electrical connector 188 of the book copier;

FIG. 22 shows the copying machine control circuit which results when connector 188 of the book copier is mated with connector 132 on the copying machine;

FIG. 23 is a sectional view of the third attachment, the microfilm reader, when placed on the copying machine, the figure being a sectional view taken through line 23-23 of FIG. 26;

FIG. 24 illustrates the sequence in which the microfilm frame 464 is moved during a copying cycle;

FIG. 25 is a side view of the microfilm reader attached to the copying machine;

FIG. 26 is a top plan view of that part of the microfilm reader attached to the copying machine;

FIG. 27 is a sectional view taken through line 27-27 of FIG. 26 and shows the positions of five switches relative to cams 402 and 403 in the microfilm reader (the switches are 

1. A microfilm attachment for a copying machine; said copying machine having a scanning window and motion-imparting means at an exposed surface thereof, an exposure window, means for transporting copy paper past said exposure window, first optical means for scanning an original effectively moved past said scanning window and exposing copy paper moved past said exposure window, first control circuit means for selectively controlling movement of said motion-imparting means and said copy paper transporting means, and copying machine connector means at the exterior of said copying machine having a plurality of connections to said first control circuit means; said microfilm attachment comprising means for holding a microfilm original, a projection lamp fOr transmitting light through said microfilm original, second optical means for directing light transmitted through said microfilm original to said scanning window, attachment connector means connectable to said copying machine connector means, means engageable with said motion-imparting means for moving said microfilm original responsive to movement of said motion-imparting means, and second control circuit means connectable through said attachment connector means and said copying machine connector means to said first control circuit means for controlling the sequencing of said first control circuit means to move said microfilm original in synchronism with said copy paper.
 2. A microfilm attachment for a copying machine in accordance with claim 1 further including a screen for viewing said microfilm original, and wherein said second optical means further includes means operative to selectively direct light transmitted through said microfilm original to said screen and said first control circuit means includes sequencing means for operating said second optical means during a copying cycle to direct light transmitted through said microfilm original to said scanning window.
 3. A microfilm attachment for a copying machine in accordance with claim 1 further including a screen for viewing said microfilm original, and wherein said second optical means further includes means operative to selectively direct light transmitted through said microfilm original to said screen such that when a microfilm original is imaged on said screen it is centrally disposed relative to said scanning window, and said first control circuit means includes sequencing means for moving said microfilm original in a first direction, then in a second direction opposite to said first direction and finally in said first direction again to said centrally disposed position during each copying cycle.
 4. A microfilm attachment for a copying machine in accordance with claim 3 wherein said microfilm original moving means includes a hub engageable with said motion-imparting means and capable of rotational movement, and a flexible tape secured at one end to said hub and at the other end to said microfilm original holding means.
 5. A microfilm attachment for a copying machine in accordance with claim 4 further including means for biasing said microfilm original holding means in said first direction, the rotation of said hub in said second direction causing said flexible tape to wind thereon and said microfilm original holding means to be moved in said second direction against the force of said biasing means.
 6. A microfilm attachment for a copying machine in accordance with claim 5 wherein said second control circuit means includes cam means for rotating with said motion-imparting means and a plurality of switches operated by said cam means and coupled to said attachment connector means, said plurality of switches being connected through said attachment and copying machine connector means to said first control circuit means for controlling the sequencing of said first control circuit means in accordance with the position of said cam means.
 7. A microfilm attachment for a copying machine in accordance with claim 2 wherein said said control circuit means includes cam means for rotating with said motion-imparting means and a plurality of switches operated by said cam means and coupled to said attachment connector means, said plurality of switches being connected through said attachment and copying machine connector means to said first control circuit means for controlling the sequencing of said first control circuit means in accordance with the position of said cam means.
 8. A microfilm attachment for a copying machine in accordance with claim 1 wherein said second control circuit means includes cam means for rotating with said motion-imparting means and a plurality of switches operated by said cam means and coupled to said attachment connector means, said plurality of switches being connected through said aTtachment and copying machine connector means to said first control circuit means for controlling the sequencing of said first control circuit means in accordance with the position of said cam means.
 9. A microfilm attachment for a copying machine in accordance with claim 8 wherein said copying machine includes means for controlling the making of multiple copies of an original, said microfilm attachment further including starting means connectable through said attachment and said copying machine connector means to said first control circuit means for initiating the operation thereof, said first control circuit means being responsive to the operation of said multiple copy controlling means for restarting said first control circuit means following each copying cycle without the operation of said starting means until the required number of copies of a microfilm original have been made.
 10. A microfilm attachment for a copying machine in accordance with claim 1 wherein said microfilm original moving means includes a hub engageable with said motion-imparting meanS and capable of rotational movement, and a flexible tape secured at one end to said hub and at the other end to said microfilm original holding means.
 11. A microfilm attachment for a copying machine in accordance with claim 10 further including means for biasing said microfilm original hOlding means in a first direction, the rotation of said hub in a second direction opposite to said first direction causing said flexible tape to wind thereon and said microfilm original holding means to be moved in said second direction against the force of said biasing means.
 12. A microfilm attachment for a copying machine in accordance with claim 1 wherein said copying machine includes means for controlling the making of multiple copies of an original, said microfilm attachment further including starting means connectable through said attachment and said copying machine connector means to said control circuit means for initiating the operation thereof, said first control circuit means being responsive to the operation of said multiple copy controlling means for restarting said first control circuit means following each copying cycle without the operation of said starting means until the required number of copies of a microfilm original have been made.
 13. A microfilm attachment for a copying machine in accordance with claim 1 wherein said first control circuit means includes sequencing means for moving said microfilm original in a first direction, then in a second direction opposite to said first direction and finally in said first direction again, and means for controlling the initiation of the operation of said copy paper transporting means while said microfilm original is first moved in said first direction.
 14. A microfilm attachment for a copying machine in accordance with claim 13 wherein said second control circuit means includes a plurality of signal generating means operated in accordance with the position of said microfilm original holding means, said plurality of signal generating means being connected through said attachment and copying machine connector means to said first control circuit means for controlling the sequencing of said first control circuit means in accordance with the position of said microfilm original holding means.
 15. A microfilm attachment for a copying machine in accordance with claim 14 wherein said copying machine includes means for controlling the making of multiple copies of an original, said microfilm attachment further including starting means connectable through said attachment and said copying machine connector means to said first control circuit means for initiating the operation thereof, said first control circuit means being responsive to the operation of said multiple copy controlling means for restarting said first control circuit means following each copying cycle without the operation of said starting means until the required number of copies of a microfilm original Have been made.
 16. A microfilm attachment for a copying machine in accordance with claim 14 further including a screen for viewing said microfilm original and a start button for initiating a copying cycle, said second optical means normally being in a position to image said microfilm original on said screen, said first control circuit means includes sequencing means to control movement of said second optical means prior to movement of said microfilm original holding means in said second direction to image said microfilm original on said scanning window.
 17. A microfilm attachment for a copying machine in accordance with claim 16 wherein said microfilm original holding means includes a plate having a projection window therein, means containing thereon a plurality of microfilm frames, and means for moving said means containing thereon a plurality of microfilm frames relative to said projection window such that a selected frame is disposed adjacent to said projection window.
 18. A microfilm attachment for a copying machine in accordance with claim 14 wherein said microfilm original holding means includes a plate having a projection window therein, means containing thereon a plurality of microfilm frames, and means for moving said means containing thereon a plurality of microfilm frames relative to said projection window such that a selected frame is disposed adjacent to said projection window.
 19. A microfilm attachment for a copying machine in accordance with claim 18 further including Fresnel lens means positionable adjacent to said scanning window.
 20. A microfilm attachment for a copying machine in accordance with claim 19 wherein said motion-imparting means and said attachment engageable means are rollers.
 21. A microfilm attachment for a copying machine in accordance with claim 13 wherein said motion-imparting means and said attachment engageable means are rollers.
 22. A microfilm attachment for a copying machine in accordance with claim 21 further including Fresnel lens means positionable adjacent to said scanning window.
 23. A microfilm attachment for a copying machine in accordance with claim 1 wherein said motion-imparting means and said attachment engageable means are rollers.
 24. A microfilm attachment for a copying machine in accordance with claim 23 wherein said microfilm original holding means includes a plate having a projection window therein, means containing thereon a plurality of microfilm frames, and means for moving said means containing thereon a plurality of microfilm frames relative to said projection window such that a selected frame is disposed adjacent to said projection window.
 25. A microfilm attachment for a copying machine in accordance with claim 1 wherein said microfilm original holding means includes a plate having a projection window therein, means containing thereon a plurality of microfilm frames, and means for moving said means containing thereon a plurality of microfilm frames relative to said projection window such that a selected frame is disposed adjacent to said projection window.
 26. A microfilm attachment for a copying machine in accordance with claim 25 further including Fresnel lens means positionable adjacent to said scanning window.
 27. A microfilm attachment for a copying machine in accordance with claim 1 further including Fresnel lens means positionable adjacent to said scanning window.
 28. A microfilm copying machine comprising an exposure window, means for transporting copy paper past said exposure window, means for holding a microfilm original, a projection lamp for transmitting light through said microfilm original, a screen for viewing said microfilm original, optical means for selectively directing light transmitted through said microfilm original to said screen and to said exposure window, a scanning window, means for moving said microfilm original in a scanning direction in synchronism with said copy paper, means for controlling said optical means during a copying cycle to diRect light transmitted through said microfilm original to said scanning window, said optical means defining an effective scanning window smaller than said microfilm original in said scanning direction, said microfilm original moving means including sequencing means for moving said microfilm original in a first direction, then in a second direction opposite to said first direction and finally in said first direction again, and means for controlling the initiation of the operation of said copy paper transporting means while said microfilm original is first moved in said first direction.
 29. A microfilm copying machine in accordance with claim 28 wherein said optical means includes means for directing light transmitted through said microfilm original to said screen such that when a microfilm original is imaged on said screen it is centrally disposed relative to said exposure window.
 30. A microfilm copying machine in accordance with claim 29 wherein said microfilm original moving means further includes a hub mounted for rotational movement, and a flexible tape secured at one end to said hub and at the other end to said microfilm original holding means.
 31. A microfilm copying machine in accordance with claim 30 further including means for biasing said microfilm original holding means in said first direction, the rotation of said hub in said second direction causing said flexible tape to wind thereon and said microfilm original holding means to be moved in said second direction against the force of said biasing means.
 32. A microfilm copying machine in accordance with claim 31 further including means for controlling the making of multiple copies of an original, starting means for initiating a copying operation, and means responsive to the operation of said multiple copy controlling means for initiating a new copying cycle following each copying cycle without the operation of said starting means until the required number of copies of a microfilm original have been made.
 33. A microfilm copying machine in accordance with claim 28 wherein said microfilm original moving means further includes a hub mounted for rotational movement, and a flexible tape secured at one end to said hub and at the other end to said microfilm original holding means.
 34. A microfilm copying machine in accordance with claim 33 further including means for biasing said microfilm original holding means in said first direction, the rotation of said hub in said second direction causing said flexible tape to wind thereon and said microfilm original holding means to be moved in said second direction against the force of said biasing means.
 35. A microfilm copying machine in accordance with claim 28 further including means for controlling the making of multiple copies of an original, starting means for initiating a copying operation, and means responsive to the operation of said multiple copy controlling means for initiating a new copying cycle following each copying cycle without the operation of said starting means until the required number of copies of a microfilm original have been made.
 36. A microfilm attachment for a copying machine in accordance with claim 28 wherein said microfilm original holding means includes a plate having a projection window therein, means containing thereon a plurality of microfilm frames, and means for moving said means containing thereon a plurality of microfilm frames relative to said projection window such that a selected frame is disposed adjacent to said projection window. 